High-Performance Optical Refractive Index Sensor Based on Concave Resonant Grating

Yining Bao; Xiuhong Liu; Jinhua Hu; Haiyan Han; Qiaofen Zhu; Sixing Xi; Jiuzhou Yu

doi:10.3788/CJL202148.0913001

Chinese Journal of Lasers, Volume. 48, Issue 9, 0913001(2021)

High-Performance Optical Refractive Index Sensor Based on Concave Resonant Grating

Yining Bao¹, Xiuhong Liu^1、*, Jinhua Hu², Haiyan Han¹, Qiaofen Zhu¹, Sixing Xi¹, and Jiuzhou Yu²

¹School of Mathematics and Physics Science and Engineering, Hebei University of Engineering, Handan, Hebei 0 56038, China

²School of Information and Electrical Engineering, Hebei University of Engineering, Handan, Hebei 0 56038, China

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Fig. 1. Schematic of concave resonant grating

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Fig. 2. Reflection spectrum of concave grating and electric field distribution at resonant wavelength. (a) Simulated reflection spectrum; (b) electric field distribution at resonance wavelength

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Fig. 3. Reflection spectra under different groove depths

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Fig. 4. Sensitivity and FWHM of the structure under different D_r. (a) Sensitivity; (b) FWHM

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Fig. 5. Sensitivity and FWHM of the structure under different width coefficients. (a) Sensitivity; (b) FWHM

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$Reflection spectra with different refractive index and resonance peak positions. (a) Simulated reflection spectra; (b) reflection resonance peak position$

Fig. 6. Reflection spectra with different refractive index and resonance peak positions. (a) Simulated reflection spectra; (b) reflection resonance peak position

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Table 1. Eigenvalues of TM eigenmodes for different D_r
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Table 1. Eigenvalues of TM eigenmodes for different D_r
D_r /nm N
30 2.0210×10¹⁵-9.754×10¹⁰i
60 2.0431×10¹⁵-2.262×10¹⁰i
90 2.0649×10¹⁵-1.152×10¹¹i

Table 2. Eigenvalues of TM eigenmodes for different f_b
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Table 2. Eigenvalues of TM eigenmodes for different f_b
f_b N
0.1 2.0096×10¹⁵-1.515×10¹¹i
0.3 2.0268×10¹⁵-2.507×10¹⁰i
0.5 2.0431×10¹⁵-2.262×10¹⁰i

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Yining Bao, Xiuhong Liu, Jinhua Hu, Haiyan Han, Qiaofen Zhu, Sixing Xi, Jiuzhou Yu. High-Performance Optical Refractive Index Sensor Based on Concave Resonant Grating[J]. Chinese Journal of Lasers, 2021, 48(9): 0913001

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